1287

Events

Europe

* January 17 - The Treaty of San Agayz is signed. King Alfonso III of Aragon conquers the island of Minorca from the Moors.
* December 14 - A fringing barrier between the North Sea and a shallow lake in Holland collapses during a heavy storm, causing the fifth largest flood in recorded history which creates the Zuider Zee inlet and kills over 50,000 people; it also gives sea access to Amsterdam, allowing its development as an important port city.
* The English city of Old Winchelsea on Romney Marsh is destroyed by catastrophic flooding during a severe storm; a new town of the same name is later constructed some two miles away on higher ground.
* The Altar of St. James at the Cathedral of San Zeno in Pistoia, Italy — a masterwork of the silversmithing trade containing nearly a ton of silver — is begun; it will not be completed for nearly 200 years.
* King Edward I of England arrests the heads of Jewish households, and demands their communities pay hefty ransoms for their release.
* Construction on the Cathedral of Uppsala is begun; it will not be completed until 1435.
* The Mongol Golden Horde, led by khan Talabuga and Nogai Khan, attacks Poland for the fourth time. Lublin, Mazovia, Sandomierz and Sieradz are ravaged by the invaders, who are defeated in Kraków.
* The Bruntal coat of arms makes its first appearance.

Asia

* Mamluk sultan Qalawun captures the port city of Latakia in present-day Syria.
* Mongol Ilkhan Arghun Khan dispatches Rabban Bar Sauma to the leaders of Europe to negotiate an alliance against the Muslim states, specifically the Mamluk sultanate of Egypt.
* Kings Mengrai of the Lanna kingdom and Ramkhamhaeng the Great of the Sukhothai kingdom agree to a peace pact in their region of southeast Asia (present-day Thailand).
* Battle of Pagan: The Theravada Buddhist kingdom at Pagan, Myanmar falls to the invading Mongol Empire.

Births

* January 24 - Richard Aungerville, English writer and bishop (d. 1345)
* April 25 - Roger Mortimer, 1st Earl of March, de facto ruler of England (d. 1330)
* Robert III of Artois

Deaths

* April 3 - Pope Honorius IV
* August 31 - Konrad von Würzburg, German poet
* October 19 - Bohemund VII of Tripoli
* Llywelyn ap Dafydd, a Welsh prince (in his prison at Bristol Castle)